MongoDB

MongoDB is a NoSQL , document-oriented database that supports JSON-like documents with a dynamic schema.

Overview

The MongoDB Document Loader returns a list of LangChain Documents from a MongoDB database.

The Loader requires the following parameters:

• MongoDB connection string
• MongoDB database name
• MongoDB collection name
• (Optional) Content Filter dictionary
• (Optional) List of field names to include in the output

The output takes the following format:

• pageContent= Mongo Document
• metadata={‘database’: ‘[database_name]’, ‘collection’: ‘[collection_name]‘}

Load the Document Loader

# add this import for running in jupyter notebook
import nest_asyncio

nest_asyncio.apply()

from langchain_community.document_loaders.mongodb import MongodbLoader

loader = MongodbLoader(
    connection_string="mongodb://localhost:27017/",
    db_name="sample_restaurants",
    collection_name="restaurants",
    filter_criteria={"borough": "Bronx", "cuisine": "Bakery"},
    field_names=["name", "address"],
)

docs = loader.load()

len(docs)

71

docs[0]

Document(page_content="Morris Park Bake Shop {'building': '1007', 'coord': [-73.856077, 40.848447], 'street': 'Morris Park Ave', 'zipcode': '10462'}", metadata={'database': 'sample_restaurants', 'collection': 'restaurants'})